The following video shows some of the enhancements included in Socialtext 4.0.1.

Some of the enhancements in Socialtext 4.0.1 include:

• Sending longer microblogging messages in Socialtext Signals
• Installing the Desktop application for rich-client access to Socialtext
• Filtering a Group's activity stream so you can focus on specific types of events
• Improving the look of certain wiki page elements

[Source: Socialtext Blog]